(19) |
 |
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(11) |
EP 0 350 312 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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09.10.1991 Bulletin 1991/41 |
(43) |
Date of publication A2: |
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10.01.1990 Bulletin 1990/02 |
(22) |
Date of filing: 06.07.1989 |
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(84) |
Designated Contracting States: |
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AT BE DE ES FR GB IT LU NL SE |
(30) |
Priority: |
08.07.1988 GB 8816310
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(71) |
Applicant: EXXON CHEMICAL PATENTS INC. |
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Florham Park
New Jersey 07932 (US) |
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(72) |
Inventors: |
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- Costemalle, Bernard Jean
B-1640 Rhode St Genese (BE)
- Hous, Pierre
B-3080 Steenokkerzeel (BE)
|
(74) |
Representative: Bawden, Peter Charles et al |
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EXXON CHEMICAL LIMITED
P.O. Box 1 Abingdon, Oxfordshire OX13 6BB Abingdon, Oxfordshire OX13 6BB (GB) |
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(54) |
Elastomeric compositions and processes for their preparation |
(57) An elastomeric composition comprising a major proportion by weight of a rubber comprising
a halobutyl rubber (e.g. 75 to 95%) and a minor proportion by weight (e.g. 5 to 25%)
of a copolymer of an olefin, e.g. ethylene, and an unsaturated carboxylic acid e.g.
acrylic acid. This composition may be covulcanised with a general purpose rubber e.g.
natural rubber, to which it has adequate adhesion. Thus a natural rubber tyre carcass
may be covulcanised with a tyre inner liner formed of this composition.